Tu Siyi and Lin Zhengzheng were childhood sweethearts, but their relationship began to break up as Tu Siyi became an idol and became increasingly popular. Tu Siyi endorsed an ancient style game, but was accidentally trapped in the game and became the third prince of the game. In order to save her boyfriend, Lin Zhengzheng entered the game as a player, but found herself as the third princess, the villain cannon fodder next to Tu Siyi, and needed to assist Tu Siyi in completing the game task of winning the throne and ascending the throne in the three lives given by the game system. Tu Siyi, whose memory was cleared by the system, regarded Lin Zhengzheng as his mortal enemy, and was subconsciously driven to lose interest in the throne, but instead became more interested in music. On one side is Lin Zhengzheng, whose goal is to compete for the throne and complete the game task, and on the other side is Tu Siyi, who is fascinated by music and just wants to retire to the countryside. The two started the mode of fighting against each other on the road to succession and found the feeling of love again.